Author Topic: Hydrated Lime for cold pasteurization of straw  (Read 2772 times)

Offline gorwell

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Hydrated Lime for cold pasteurization of straw
« on: September 17, 2014, 04:00:48 AM »
I learned the hard way that you can't use just any hydrated lime to pasteurize straw for mushroom cultivation. It took quite a bit of reading to identify a brand that would be suitable. I thought maybe a post here would shorten the next person's search.

Anyway, what you need is a calcitic hydrated lime with the smallest magnesium content possible.

I use Hoffman Hydrated Horticultural Lime Soil Amendments, as listed on Amazon. The bag in the picture is not the bag that arrives. It now comes in a resealable plastic bag. But it does the trick.

Offline Mike O

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Re: Hydrated Lime for cold pasteurization of straw
« Reply #1 on: July 04, 2017, 11:11:02 AM »
Cement Australia's Hydrated lime looks the goods.
Chemical Entity Proportion CAS Number
Water 0.1 - 2.5% 7732-18-5
Calcium Hydroxide 90 - 95% 1305-62-0
Magnesium Hydroxide 0.5 - 1.0% 1309-42-8
Crystalline Silica (Quartz) <1% 14808-60-7
Silicon Dioxide 0.5 - 2% 7631-86-9
Aluminium Dioxide 0 - 2% 1344-28-1
Iron Oxide 0 – 0.4% 1309-37-1

http://www.cementaustralia.com.au/wps/wcm/connect/website/packaged-products/home/sds-pds/